REACTIVITY OF LITHIUM INTERCALATED INTO PETROLEUM COKE IN CARBONATE ELECTROLYTES

The results of a study of the reactivity of lithium intercalated into petroleum coke (Conoco) in a PC/EC/DMC (1/1/3 volume) mixture and LiCF 3SO3 as the lithium salt are presented here. We show the loss of inter calated lithium is due to its reactivity with the electrolyte and incr eases quasi-linearly during 1000 h of storage, and thereafter becomes less important as the storage time increases. The storage of passivate d petroleum coke electrodes without any lithium content allowed us to determine the rates of the precipitation and dissolution reactions inv olving the passivating layer.